10.1021/acs.jpca.6b04641.s001 Lei Zhou Lei Zhou Peter A. Tanner Peter A. Tanner Lixin Ning Lixin Ning Weijie Zhou Weijie Zhou Hongbin Liang Hongbin Liang Lirong Zheng Lirong Zheng Spectral Properties and Energy Transfer between Ce<sup>3+</sup> and Yb<sup>3+</sup> in the Ca<sub>3</sub>Sc<sub>2</sub>Si<sub>3</sub>O<sub>12</sub> Host: Is It an Electron Transfer Mechanism? American Chemical Society 2016 electron transfer mechanism energy conversion 3 Sc 2 Si 3 O 12 Host garnet host Energy Transfer Yb Spectral Properties energy transfer Electron Transfer Mechanism Ce energy transfer efficiency 2016-06-22 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Spectral_Properties_and_Energy_Transfer_between_Ce_sup_3_sup_and_Yb_sup_3_sup_in_the_Ca_sub_3_sub_Sc_sub_2_sub_Si_sub_3_sub_O_sub_12_sub_Host_Is_It_an_Electron_Transfer_Mechanism_/3473813 The downshifting from Ce<sup>3+</sup> blue emission to Yb<sup>3+</sup> near-infrared emission has been studied in the garnet host Ca<sub>2.8–2<i>x</i></sub>Ce<sub>0.1</sub>Yb<sub><i>x</i></sub>Na<sub>0.1+<i>x</i></sub>Sc<sub>2</sub>Si<sub>3</sub>O<sub>12</sub> (<i>x</i> = 0–0.36). The downshifting does not involve quantum cutting, but one incident blue photon is transferred from Ce<sup>3+</sup> to Yb<sup>3+</sup> with an energy transfer efficiency up to 90% when <i>x</i> = 0.36 for the Yb<sup>3+</sup> dopant ion. For <i>x</i> ≤ 0.15, a multiphonon-assisted electric dipole–electric quadrupole mechanism of energy transfer dominates, while for the highest concentration of Yb<sup>3+</sup> employed, the electron transfer mechanism is confirmed. A temperature-dependent increase of the Ce<sup>3+</sup> → Yb<sup>3+</sup> energy transfer rate does not exclusively indicate the electron transfer mechanism. The application of the material to solar energy conversion is indicated.